Durability of a Compact Dual-Cavity Full-Toroidal IVT Variator

Lee, Adrian P.; Newall, Jonathan

doi:10.4271/2004-01-0353

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…The speed of the two followers of the two units is shown in Figure (5). This figure shows that a single speed stroke (about 0.5 mm/s) takes place during all operating period, when the other supplier has a return stroke.…”

Section: Figure (3): Grooved Wheelmentioning

confidence: 97%

“…a mathematical model (and the outcomes of that model) were able to produce power transfer that was more efficient than with a CVT, notably in cars. Lee (2004) [5] and Verbelen (2018) [6], created a Complete -Toroidal IVT transmitter and examined it completely in order to look for uses for the technology. With pressures, the capacity increased.…”

Section: Introductionmentioning

confidence: 99%

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Cam based Infinitely Variable Transmission Theoretic Modelling

Faleh

Al-Hamood

Majeed

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Infinitely variable transmission (IVT) is a system which delivers the ratio between two turning elements to a continuous (non-discrete) variation (including zero). This article uses Solidworks software to build and simulate a cam-based IVT system. There are two identical units in the system under examination. Each unit comprises a cam with an oscillating slot connection that swings on a hinge and can be vertically shifted by changing the transmission rate. This modifier can be a power screw or a hydraulic ram. In addition, a grooved wheel and followers or an actuator are included in the system units. The raised wheels swing rotating movement, such that they are coupled by a single-way clutch to the output shaft (ratchet) to move the output shaft one way. During the performance research, cam shapes are considered and examined inside the mechanism. a mixture of the unchanging speed and 1-5 polynomial shapes, used for the current investigation and tailored for The results produced from the simulation generally reveal the theoretical results expected in accordance with the layout of the current IVT system. For all parts in these units, the findings imply a uniform velocity while each unit is powered. In this investigation, nevertheless, the ratchets used cause remarkable fluctuations in the angular speed of the output axis. Further research is therefore urgently needed in the choice and investigation of more efficient ratchets.

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Section: Figure (3): Grooved Wheelmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Cam based Infinitely Variable Transmission Theoretic Modelling

Faleh

Al-Hamood

Majeed

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Another traction CVT is the toroidal type [9][10][11], in which power is transmitted purely by the friction force between two contact surfaces or by the shear strength of a viscous fluid. The limited transmitted power and the low reliability are well-known limitations of the traction-based CVT systems, which reduce their usability.…”

Section: Introductionmentioning

confidence: 99%

Modeling and theoretical analysis of a novel ratcheting-type cam-based infinitely variable transmission system

Al-Hamood

Jamalia

Imran

et al. 2019

Comptes Rendus. Mécanique

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An infinitely variable transmission (IVT) is a system that allows for a continuous (nondiscrete) variation (including zero) in transmission ratio between two rotating elements. In this paper, a novel ratcheting-type IVT mechanism is presented and its geometrical design and kinematic analysis are studied in details. The proposed system contains two identical units. Each unit includes a cam with a follower, oscillatory slotted links pivoted at a shaft that can be moved vertically by a hydraulic ram (alterable transmission ratio), and a grooved wheel with an actuating rod. The input rotational motion is converted through each unit to an oscillatory angular motion of controlled amplitude. This resulting motion is rectified using a ratchet to get a unidirectional output rotational motion. Therefore, the system output motion will have a different velocity and acceleration than those of the system input. The kinematic analysis revealed that the transmission ratio can be varied continuously in a range from zero to infinity. The analysis also showed that, for particular transmission ratios, the system gives uniform output (angular velocity and acceleration) for a corresponding uniform input.

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